Scanditronix Cyclotron Workshop Copenhagen University Hospital 20-21'th June 2017

Transcription

1 Report from Turku Stefan Johansson Åbo Akademi University Accelerator laboratory Turku Finland Scanditronix Cyclotron Workshop Copenhagen University Hospital 20-21'th June 2017 Turku PET Centre University of Turku Åbo Akademi University Turku University Hospital

2 Turku PET Centre Organisation Åbo Akademi University, Cyclotrons Turku University, Radiochemistry Turku University Central Hospital, Imaging Åbo Akademi, Cyclotrons and Targetry 1 Physisist 2 Chemists 1 Engineer 1 Technichian Cyclotrons Staff Turku PET Centre University of Turku Åbo Akademi University Turku University Hospital

3 Campus CC 18/9 and TR19 MGC-20 Turku PET Centre Cyclon 3 Medi City Åbo Akademi Univ. Gadolinia Building Turku PET Centre University of Turku Åbo Akademi University Turku University Hospital

4 MGC-20 TPC cyclotrons Cyclon 3D TR19 Turku PET Centre CC18/9 University of Turku Åbo Akademi University Turku University Hospital

5 Sectors Dees MGC-20 CC18/9 TR

6 TPC Cyclotrons MGC-20 Cyclon 3d CC18/9 TR19 Pole diameter 103 cm 50 cm 110 cm 114 cm Magnet weight kg kg kg kg Frequency MHz 12.2 MHz 38.2 MHz 74.2 MHz Harmonic mode 1 and Ion Source Internal Internal External External Type Livingston Hot filament P.I.G. Cold filament Multicusp Multicusp Extraction Deflector Deflector Carbon foil Carbon foil Beam intensity 50 µa (300 µa) 50 µa 100 µa 230 µa Targets

7 TPC Cyclotrons MGC-20 Cyclon 3D CC18 / 9 TR 19 Protons H 2 + Ions 3-20 MeV 18 MeV MeV MeV Deuterons 3 Helium α- Particles MeV 8-29 MeV MeV 3.5 MeV 9 MeV

8 MGC-20 Resonator with movable panels ( MHz ) Movable panels Small trim capacitors Big trim capacitors Turku PET Centre University of Turku Åbo Akademi University Turku University Hospital

9 MGC-20 now and then years of operation Turku PET Centre , after 43 years of operation University of Turku Åbo Akademi University Turku University Hospital

10 A five ring polyphenyl ether Santovac 5 The shelf life for Santovac 5 is 7 years from date of manufacture if stored in a sealed container. If product has been opened or stored in a metal can, it is recommended to test the product after 5 years. Price: 1200 Euro / 500ml (2017)

11 Santovac 5 Used in Balzer DIF 320 diffusin pump for over 28 years ~140000h, about 16 years of cont. use Never opened before No oil fill during 28 years Very thin dark layer no cleaning done

12 Original diffusion pump exposed to air

13 Analysis of Santovac 5 1. Used Santovac 5, Unused Santovac 5, New santovac 5, Polyphenyl Ether,

14 Diffusion vs. Turbo Pump 13C NMR spectrum of Polyphenyl ether diffusion pump oils Old Sovjet Polyphenyl ether New Santovac 5 Unused old Santovac 5 Used old Santovac 5 Analyzed by the Laboratory of Organic Chemistry at Åbo Akademi University (Bruker 500 MHz AVANCE-III)

15 High vacuum pumps Diffusion pump Price Less Maintenance Not sensible to magnetic fields Turbo Molecular pump Less Power Clean Vacuum Faster to start and stop Not sensible to air inrush Cryo pump Pumping Speed Clean Vacuum Traps target gases in case of foil break

16 Turbo Pumps in use at TPC Type Year Flange Mounted Balzer TPH DN 100 ISO-K Beam Line 1 MGC-20 Balzer TPH DN 100 ISO-K Beam Line 2 MGC-20 Balzer TPH DN 100 ISO-K Beam Line 3 MGC-20 * Pfeiffer TMH DN 100 ISO-K Beam Line CC18/9 ** Pfeiffer TPH 2101 P 2003 DN 250 ISO-K Ion Source CC18/9 Pfeiffer TPH 2301 P 2004 DN 250 ISO-K Injecton line CC18/9 Pfeiffer TPH 2301 P 2009 DN 250 ISO-K Cyclotron CC18/9 HBT DN 250 ISO-K Not mounted Varian V DN 160 ISO-K Cyclotron MGC-20 Agilent Twiss Torr 304 FS 2015 DN 100 ISO-K Ion Source TR19 Osaka TG 1300 MBWB 2015 DN 200 ISO-K Ion Source TR19 * Rotor damaged after some weeks of operation. Warranty repair ** Pump crash because of wrong installation

17 MGC-20 Turbo Balzer Dif 320 Varian 551 HBT

18 1.0E E-06 Cyclotron standby vacuum with different pump setups TPH E E-06 Vacuum [ mbar ] 6.0E E E E E-06 V 551 HBT 1000 DIF 320 DIF V 551 DIF HBT E Pump capacity [ l/s ]

19 3.1E-5 V 551 Cyclotron vacuum with beam 2.6E-5 2.1E-5 Vacuum [ mbar ] 1.6E-5 1.1E-5 6.0E-6 DIF 320 DIF V E Pump capacity [ l/s ]

20 CC18/9 Target position 3 and

21 Targets 18 F Volume Max current Pressure Yield in 1hour Foil Body MGC ml 10 µa * 35 GBq AISI 321 Ag CC18/9 2.2 ml 30 µa (40 µa) ** 40 bar 60 GBq AISI 321 Nb TR19 5 ml 100 µa 8.2 bar 240 GBq Havar Nb 11 CO 2 Length Max current Pressure Yield in 20 min. Foil Body MGC mm 10 µa 42 bar AISI 321 Al CC18/9 100 mm 30 µa (40 µa) ** 73 bar 78 GBq AISI 321 Al TR mm 40 µa 44 bar 120 GBq Havar Al 11 CH 4 Lenght Max current Pressure Yield in 20 min Temperature Foil MGC mm 10 µa 40 bar 50 ºC AISI 321 CC18/9 100 mm 30 µa (40 µa) ** 80 bar 75 GBq 70 ºC AISI 321 TR mm 40 µa 38 bar 65 GBq 60 ºC Havar * Beam wobbling ** Grid support of target foils 75% trancparency, no helium cooling and beam wobbling Collimator 10 mm on all targets

22 Radioactivity detectors along transfer lines 18F Clean Rooms Detector m Service Tunnel Detector m 5.7 m 4.1m 1.2 m Length of tubing between detectors Total length ~40 m 9.2 m 9.6 m Service Tunnel GM Tube Detector 4 and 5 Detector 3 Data Collecting And Detector Electronics Unit Detector 2 Gamma Probe Detector 1 Pump

23 CC18/9 beam profile for protons at the end of beamline 5 Camera on fluorescent screen 2µA max. Photo Stimulated Light Autoradiography from irradiated copper plate

24 Beam profile using Gafcromic film from irradiated solid target Output from Doselab software

25 Find five similarities Thank you for your attention